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Galvanic Cells
In a Galvanic cell, electric current is generated because of a spontaneous redox reaction. Zn has a greater tendency of losing electrons which transfer and reduce the Cu2+ ions to Cu metal. Galvanic cells have a positive cell potential (E > 0), and a negative free energy change (ΔG < 0). In any electrochemical cell, oxidation always occurs on the anode, and the reduction occurs on the cathode. The anode is negatively charged, and the cathode is positively charged.
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